Post-drill attachment.



T81R14 cases y PATENTED AUG. 18, 1908. mYAELIANT. POST DRILL ATTACHMENT.

APPLICATION FILED SEPT. 19, 1906.

EST AVAaABLE copy UNITED STATES PailENT onrion.

RICHARD VALLIANT, OF VICTORY, WISCONSIN.

POST-DRILL ATTACHJVIENT.

Specification of Letters Patent.

Patented Au a-sees.

Application filed September 19, 1906. Serial No. 335,290.

To all whom it may c071 rem:

Be. it known that l, RICHARD VALLIANT, a citizen of the United States, residing at Victory, in the county of Vernon and State of Wisconsin, have -invented new and useful Improvements in Post-Drill Attachments, of which the following is a specification.

This invention relates to post drill attachments, and one of the principal objects of the same is to provide an attachment for machines of this kind which can be readily adjusted to fit die blocks or taps of different sizes and hold them in position for use.

Another object of my invention is to pro,- vide a spring clamp attachmertfor post drills With means for attaching the clamp to chucks of diifering sizes, said clamp being provided with resilient means for clamping di e blocks or' taps of 'diflering sizes.

Still another object of my invention is to provide a spring clamp for attachment to a drill chuck and for holding die blocks and taps of difierent sizes, and to provide means for supporting said attachment upon the frame during the operation of changing the taps or die blocks in the clamp. A

These and other objects may be attained by means of the construction illustrated in' the accompanying drawing, in which:

view through the dieblockdiold" Figure 1 1s a side view of a' post drill having my attachment connected thereto. Fig. 2 is a front elevation of the same. Fig. 3 is a plan view 01'' my attachment. Fig. 4' is a scctionz'tl wr tap holder. Fig. 5 is a side elevation of he hook for supporting the attz'ic'hmcnt during the operation of changing the die blocks or tap.

Relerringto the drawing for a more particular description ol my invention, the nu moral 1 designates the drill shaft of an ordi nary post drill provided with a chuck 2 ol" the usual or any prelerrcd minstruction, and 3 is'a vise for holding the bolts or nuts, said vise being supported upon the seat 4 of the.

drill.

My attachment consists of a double springclamp comprising the upper ring 5 and the lower ring 6 connected by diverging arms 7. The ring .5 isadapted to be secured to a drill chuck '2. which may be of large or small diametcr, said ring 5 being resilient and provided with outwardly extending lugs 8 through which a binding screw 2) is passed. The screw 9 may-be turned lordrawing together the two lugs 8 for clamping the ring 5 upon the chuck and a set screw 10 passing through the ring, is designed to firmlyhold the ring 5 in engagement with said chuck. The arms 7 are formed integral with the ring 5 and at the lower ends of said arms the die block or tap holding ring 6 is formed thereon. The

ring 6 is provided with outwardly projecting lugs 11 provided with registering threaded apertures for' the bmdmg screw 12. Set

screws 13 p ass through the ring 6 at diametrically opposite points for holding a die block or tapholder of any suitable dimensions.

The die block or tap holder shown in Fig. 4,

comprises a recessed block 14 in which a pair of dogs 15 are fitted to slidetoward and from each other to hold a die or tap of any required style, said dogs being held in adjusted position by means of the binding screws 16. The die block 14 is adapted to be titted within the ring 6 and clamped therein by means of the binding screw 12 and the set screw 13.

A spring mounted supporting" hook is shown in Fig. 5 which comprises a clamping ring 17 adapted to be secured, as shown,

upon a boss or hub for the lower end of the S0 spindle bearing upon the frame by means of a binding screw 18. A lug 1%) depends from the ring 17 and a hook or latch device 20 is pivoted at 21 to the outwardly projecting lug 22 on said ring. A spring 23 upon outwardly projecting pins 24 formed upon the. hook l0 and upon the lug 19, said spring being secured at its ends to said pins to hold the hook '20 normally in the position shown in Fig. 1. the attzu-lunent the union nut 26 which forms the usual swivel connection between the feed screw 25 and the spindle, is released and the feed screw run upward. The spindle is then l'ree'to slide through the driving pinion which 9 is splined to it as usualv and is in condition to be used for cutting screw illl'tfltlS. ;\\'hen it is desired to change work or the die block or tap, the spindlc is slid up\\ard,aml the hook 20 caused to engage the lower edge ol the ring 6.

The operation ol' my invention may be readily understood from the foregoing.

. Mv attachment is l'ormed of resilient ma-.

terial and the ring 5 is of a size to lit drill sizes. Tl10 i'l-tljllzitllltllt-SC1111.bOtlullflilylllittitl is mounted 8 When it is desired to uscflO and the attachment, being of simple condle adapted to be engaged by the latch when 10 struction, cannot readily get out of order the spindle is in raised position, substanand will operate efiiciently for its purpose. tially as specified.

Having thus described the invention, What Intestimony whereof, I affix my signature I claim is: in presence of two Witnesses. i

In a screw threading machine, a spindle RICHARD VALLIANT.

free to slide vertically, a driving wheel Witnesses:

splined thereon, a tool holder on the spindle, ANDREW O. NETLAND,

a latch on the frame, and means on' the spin- PETER MGNERNEY. 

